<x-row>
  <x-col span="8">
    <x-textarea required [(ngModel)]="value"></x-textarea>
  </x-col>
</x-row>
<x-row>
  <x-col span="8">
    <x-textarea label="用户名" required [(ngModel)]="value"></x-textarea>
  </x-col>
</x-row>
<x-row>
  <x-col span="8">
    <x-textarea icon="ado-user" required [(ngModel)]="value"></x-textarea>
  </x-col>
</x-row>
